"""Switch platform for AdGuard Control Hub integration."""
import logging
from typing import Any, Optional

from homeassistant.components.switch import SwitchEntity, SwitchDeviceClass
from homeassistant.config_entries import ConfigEntry
from homeassistant.core import HomeAssistant
from homeassistant.helpers.entity import EntityCategory
from homeassistant.helpers.entity_platform import AddEntitiesCallback
from homeassistant.helpers.update_coordinator import CoordinatorEntity

from . import AdGuardControlHubCoordinator
from .api import AdGuardHomeAPI, AdGuardHomeError
from .const import DOMAIN, ICON_PROTECTION, ICON_PROTECTION_OFF, ICON_CLIENT, MANUFACTURER

_LOGGER = logging.getLogger(__name__)


async def async_setup_entry(
    hass: HomeAssistant,
    config_entry: ConfigEntry,
    async_add_entities: AddEntitiesCallback,
) -> None:
    """Set up AdGuard Control Hub switch platform."""
    coordinator = hass.data[DOMAIN][config_entry.entry_id]["coordinator"]
    api = hass.data[DOMAIN][config_entry.entry_id]["api"]

    entities = [AdGuardProtectionSwitch(coordinator, api)]

    # Add client switches if clients exist
    for client_name in coordinator.clients.keys():
        entities.append(AdGuardClientSwitch(coordinator, api, client_name))

    async_add_entities(entities, update_before_add=True)


class AdGuardBaseSwitch(CoordinatorEntity, SwitchEntity):
    """Base class for AdGuard switches."""

    def __init__(self, coordinator: AdGuardControlHubCoordinator, api: AdGuardHomeAPI) -> None:
        """Initialize the switch."""
        super().__init__(coordinator)
        self.api = api
        self._attr_device_info = {
            "identifiers": {(DOMAIN, f"{api.host}:{api.port}")},
            "name": f"AdGuard Control Hub ({api.host})",
            "manufacturer": MANUFACTURER,
            "model": "AdGuard Home",
            "configuration_url": f"{'https' if api.ssl else 'http'}://{api.host}:{api.port}",
        }

    @property
    def available(self) -> bool:
        """Return if switch is available."""
        return self.coordinator.last_update_success


class AdGuardProtectionSwitch(AdGuardBaseSwitch):
    """Switch to control global AdGuard protection."""

    def __init__(self, coordinator: AdGuardControlHubCoordinator, api: AdGuardHomeAPI) -> None:
        """Initialize the switch."""
        super().__init__(coordinator, api)
        self._attr_unique_id = f"{api.host}_{api.port}_protection"
        self._attr_name = "AdGuard Protection"
        self._attr_device_class = SwitchDeviceClass.SWITCH
        self._attr_entity_category = EntityCategory.CONFIG

    @property
    def is_on(self) -> Optional[bool]:
        """Return true if protection is enabled."""
        return self.coordinator.protection_status.get("protection_enabled", False)

    @property
    def icon(self) -> str:
        """Return the icon for the switch."""
        return ICON_PROTECTION if self.is_on else ICON_PROTECTION_OFF

    @property
    def available(self) -> bool:
        """Return if switch is available."""
        return self.coordinator.last_update_success and bool(self.coordinator.protection_status)

    @property
    def extra_state_attributes(self) -> dict[str, Any]:
        """Return additional state attributes."""
        status = self.coordinator.protection_status
        return {
            "dns_port": status.get("dns_port", "N/A"),
            "version": status.get("version", "N/A"),
            "running": status.get("running", False),
            "dns_addresses": status.get("dns_addresses", []),
        }

    async def async_turn_on(self, **kwargs: Any) -> None:
        """Turn on AdGuard protection."""
        try:
            await self.api.set_protection(True)
            await self.coordinator.async_request_refresh()
            _LOGGER.info("AdGuard protection enabled")
        except AdGuardHomeError as err:
            _LOGGER.error("Failed to enable AdGuard protection: %s", err)
            raise
        except Exception as err:
            _LOGGER.exception("Unexpected error enabling AdGuard protection")
            raise

    async def async_turn_off(self, **kwargs: Any) -> None:
        """Turn off AdGuard protection."""
        try:
            await self.api.set_protection(False)
            await self.coordinator.async_request_refresh()
            _LOGGER.warning("AdGuard protection disabled")
        except AdGuardHomeError as err:
            _LOGGER.error("Failed to disable AdGuard protection: %s", err)
            raise
        except Exception as err:
            _LOGGER.exception("Unexpected error disabling AdGuard protection")
            raise


class AdGuardClientSwitch(AdGuardBaseSwitch):
    """Switch to control client-specific protection."""

    def __init__(
        self,
        coordinator: AdGuardControlHubCoordinator,
        api: AdGuardHomeAPI,
        client_name: str,
    ) -> None:
        """Initialize the switch."""
        super().__init__(coordinator, api)
        self.client_name = client_name
        self._attr_unique_id = f"{api.host}_{api.port}_client_{client_name}"
        self._attr_name = f"AdGuard {client_name}"
        self._attr_icon = ICON_CLIENT
        self._attr_device_class = SwitchDeviceClass.SWITCH
        self._attr_entity_category = EntityCategory.CONFIG

    @property
    def is_on(self) -> Optional[bool]:
        """Return true if client protection is enabled."""
        client = self.coordinator.clients.get(self.client_name, {})
        return client.get("filtering_enabled", True)

    @property
    def available(self) -> bool:
        """Return if switch is available."""
        return (
            self.coordinator.last_update_success 
            and self.client_name in self.coordinator.clients
        )

    @property
    def extra_state_attributes(self) -> dict[str, Any]:
        """Return additional state attributes."""
        client = self.coordinator.clients.get(self.client_name, {})
        blocked_services = client.get("blocked_services", {})
        if isinstance(blocked_services, dict):
            blocked_list = blocked_services.get("ids", [])
        else:
            blocked_list = blocked_services or []

        return {
            "client_ids": client.get("ids", []),
            "safebrowsing_enabled": client.get("safebrowsing_enabled", False),
            "parental_enabled": client.get("parental_enabled", False),
            "safesearch_enabled": client.get("safesearch_enabled", False),
            "blocked_services_count": len(blocked_list),
            "blocked_services": blocked_list,
        }

    async def async_turn_on(self, **kwargs: Any) -> None:
        """Enable protection for this client."""
        try:
            client = await self.api.get_client_by_name(self.client_name)
            if client:
                update_data = {
                    "name": self.client_name,
                    "data": {**client, "filtering_enabled": True}
                }
                await self.api.update_client(update_data)
                await self.coordinator.async_request_refresh()
                _LOGGER.info("Enabled protection for client: %s", self.client_name)
            else:
                _LOGGER.error("Client not found: %s", self.client_name)
        except AdGuardHomeError as err:
            _LOGGER.error("Failed to enable protection for %s: %s", self.client_name, err)
            raise
        except Exception as err:
            _LOGGER.exception("Unexpected error enabling protection for %s", self.client_name)
            raise

    async def async_turn_off(self, **kwargs: Any) -> None:
        """Disable protection for this client."""
        try:
            client = await self.api.get_client_by_name(self.client_name)
            if client:
                update_data = {
                    "name": self.client_name,
                    "data": {**client, "filtering_enabled": False}
                }
                await self.api.update_client(update_data)
                await self.coordinator.async_request_refresh()
                _LOGGER.info("Disabled protection for client: %s", self.client_name)
            else:
                _LOGGER.error("Client not found: %s", self.client_name)
        except AdGuardHomeError as err:
            _LOGGER.error("Failed to disable protection for %s: %s", self.client_name, err)
            raise
        except Exception as err:
            _LOGGER.exception("Unexpected error disabling protection for %s", self.client_name)
            raise